Thermal Master P3 review: Excellent close-up thermal imaging for your phone

When you purchase through links in our articles, we may earn a small commission. The Thermal Master P3 transforms a smartphone into a compact thermal imaging camera via the USB-C port, ideal for everyday use, trades, and troubleshooting. At a street price of around $300, the P3 delivers high image quality for this price range. A standout feature is the manual focus, which proves its worth when shooting a wide variety of subjects. In our test, we used it to examine the heat distribution on a sauna heater, check for unusual heating during the installation of an Anker Solix solar panel in the cellar, and visualize the waste heat from mini PCs and projectors.